Picker-check for looms



(No Model) B. THAOKERAY. PIOKER 03501: FOR LOGMS.

No. 597,192. Patented Jan. 11,1898.

WITNESSEE.

. against the swells.

UNITED STATES PATENT @rrrcs.

RICHARD THACKERAY, OF FALL RIVER, MASSACHUSETTS.

PICKIER-CHECK FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 597,192, dated January11, 1898.

Application filed February 9,1897. Serial No. 622,600. (No model.)

To ctZZ whom it may concern.-

Be it known that I, RICHARD THAOKERAY, of Fall River, in the county ofBristol and State of Massachusetts, have invented a new and usefulImprovement in Looms; and I hereby declare that the following is a full,clear, and exact description of the same, reference being had to theaccompanying drawings, forming part of this specification.

This invention has reference to an improvement in the shuttle-throwingmechanism of a loom.

The object of the invention is to control the throwing and the arrestingof the shuttle more perfectly and increase the speed of the loom.

Another object of the invention is to replace the leather straps used tocushion the pickerstick by more durable mechanical devices acting on therocker of the picker-stick.

In power-looms as heretofore constructed the shuttle-boxes are providedwith swells. Arms extend from the protector-rod and bear Springs actingon the prorector-rod exert uniform yielding pressureon the swells. Whena shuttle enters the shuttle-box, the swell is moved outward and movesthe arm in contact with the swell, so as to partially rotate theprotector-rod. The friction of the shuttle on the swell retards thevelocity of the shuttle which strikes the picker-stick and carries thesame to the outer fer-straps.

limit, where the stick is usually arrested by means of leather straps orcushions.

In the looms above described the springpressure on the swells isuniform. It is maintained uniform on the ingoing and outgoing of theshuttle and must be such pressure that while the swell retards thevelocity of the shuttle it does not arrest the same, but allows theshuttle to pass by the swell and carry the picker-stick to its outerlimit, where the stick is arrested by leather cushions or buf- In suchlooms the shuttle is liable to rebound and is not held in contact withthe describe hereinafter mechanism acting on the rocker of thepicker-stick and the protectorrod by which the shuttle as it enters theshuttle-box is retarded by the swell, and as the shuttle moves with thepicker-stick the pressure on the swell is gradually increased to retardthe shuttle, while the resistance of the picker-stick is also graduallyincreased until the momentum of the shuttle is balanced by theresistance and the shuttle is firmly locked or held in the desiredposition.

hen the shuttle is thrown, the pickerstick moves the shuttle against thegraduallydiminishing pressure on the swell and sends it through the shedinto the opposite shuttlebox.

As far as I know, I am the first to so construct a loom that the shuttleis received in the shuttle-box and the momentum arrested by agradually-increasin g frictional resistance and a gradually-increasingresistance of the picker-stick. I. do not, therefore, wish to confinemyself to the specific construction herein shown and described.

Figure 1 is a transverse sectional view of so much of a loom as isrequired to-illustrate the invention. Fig. 2 is an enlarged side View ofthe foot-support of the picker-stick and the lever cooperating with therocker of the picker-stick. Fig. 3 is a sectional view, on an enlargedscale, of the lay, sh owing the arm connected with the protector-rod andbearing on the swell.

Similar numerals of reference indicate corresponding parts in all thefigures.

In the drawings, 4 4 indicate the end frames of the loom; 5, therock-shaft, from which the arms 6 6 extend which support the lay 7; 8 8,

tector-rod; 11 11, the arms secured to the protector-rod and bearing onthe swells 9; 12 12, two hooked-levers projecting from the rear of theprotector-rod to which the wires or straps 13 are secured. The lowerends of these wires or straps are secured to the upper ends ofthe coiledsprings 14.

To the ends of the rock-shaft 5 the pickerstick shoes 15 15, providedwith the horns 16,

are secured. The picker stick rocker 17,

which is of the usual construction, rests on and rocks on the shoe 15.The picker-stick rocker is provided with the loop 18, the

the shuttle-boxes; 9 9, the swells; 10, the pro shanks 19 of whichbearagainst the horns 16. The loop 18 is connected by the wire strap 20 withthe floor-spring '21. The picker-stick 22 is secured to the'pickenstickrocker in the is exerted, on the coiled spring l t and the least strainon the floor-spring 21'on the lefthand side of the loom. The strain thusexerted on the coiled spring 14 acts through the pro.- teetor-rod on theswell to bind the shuttle and through the lever 24: on the end of thepickerstick rocker.

On the righthand side of Fig. 1 the strains on the coiled spring 14: andthe floor-spring 21 are practically balanced. Thepress ure on the swell9 of that side is the minimum pressure.v

When the shuttle in the left-hand shuttlebox is moved by thepicker-stick, the toe end 17 of the rocker descends, the bifurcated endof the lever 24 follows the toe, and the short end 25 of the lever risesand diminishes the tension on the springle, thereby diminishing thestrain on the protector-rod and the pressure on the swell 9. thefrictional resistance decreases untilthe final blow is given to send theshuttle across the shed. As the shuttle enters the shuttlebox on theright-hand side of the loom the pressure on the swell is sufficient toretard the shuttle by the friction on the swell. When the shuttlestrikes the picker-stick and moves the upper end outward, the bifurcatedend of the lever 24 is moved upward by the toe of the rocker 17, thetension on the spring 14 increases rapidly, and with it the pressure onthe swell, while the momentum of the shuttle decreases until it isarrested. The shuttle at this point is firmly held by the swell. It isin contact with the picker-stick and ready for the next throw. By thuscontrolling the picker-stick and shuttle and maintaining the contactbetween the same I find I can materially increase the speed of the loomand run the loom at higher speed with less jar and wear than when theloom is provided with the usual leather straps and cushions and run atlower speed.

The only parts added to the loom are the levers 24:, and these can beapplied to any form of loom at small cost. The constant renewal of theleather straps is saved and the picker-stick is not liable to be twistedand broken by the blow of the shuttle, as it now moves straight andfair, while the straps which yielded on one side while the other sidewas As the shuttle proceeds fixed supported the stick more on one sidethan the other and caused it to twist.

I have chosen to show a constructionin which the swells are operatedupon by the arms on the protector-rod, but it is evident that thecentral portion of the protector-rod, 1

between the hooked levers 12 12, may be cut out and each shuttle-boxswell operated independent of the other and independent of theprotector-rod without materially changing the operation of the loom.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent I Y 1. In a loom,the combination of the followinginstrumentalities,viz: alay, the shut 1tle-boxes at the opposite ends of thelay, swells in the shuttle-boxesaprotector-rod, provided with arms, bearing on the swells,

the picker-sticks, the rocker-supports for the picker-sticks, thesprings connected with the same, and mechanism, substantially asdescribed, comprising a coiled spring connecting each picker-stick withthe protector-rod,

tie-box, a picker-stick and the rocking support for the foot of thesame, of a shaft supported on the lay, an arm secured to said shaftatone end, the other end of the arm bearing on the swell, a leverpivotally supported on'the supporting-arm of the lay, and connectionsbetween the said lever and the picker-stick and between said lever andthe arm bearing on the swell, having a coiled spring interposed in suchconnection, wherebythe pressure on the swell is increased as thepicker-stick is moved outward to hold the shuttle against rebound and isdiminished as the picker-stick and shuttle move inward to throw theshuttle, as described.

3. In a loom, the combination with the lay with its supporting-arms, theshuttle-boxes, on the lay, the swells connected with the shuttle-boxes,and the pickersticks with their usual connections and supports, of twoarms pivotally supported on the lay and bearing on the swells, twolevers pivotally supported on the arms of the lay, connections betweenthe levers and the arms bearing on the swells, comprisinga coiled springin each conneetion, and connections between the said levers and thepicker-sticks; whereby the velocity of the shuttle is retarded by theswell of the shuttle-box and arrested by the increasing pressure on theswell and increasing resistance of the picker-stick, and its outwardmovement is facilitated by the gradually-decreasing pressure on theswell, as described.

4. In a loom, the combination with the lay 7, the supporting-arms 6, 6,the shuttle-boxes 8, 8, the swells 9, 9, the protector-rod 10 providedwith the arms 11, 11, bearing on the swells, the hooked levers 12, 12,projecting from the protector-rod, the floorsprings 21, 21, thepicker-sticks 22, 22, the operatingstraps 23 and the rocking supports 17of the picker sticks connected with the floor-springs, of the levers 24-pivotally supported on the arms 6, 6, the bifurcated ends 24 hearing onthe toe 17 the notched arms 25 25 of the le- Vers 24, 24:, the coiledsprings 14:, 14:, and the straps 13, 13, and 26, 26,0onnecting thesprings IQ with the levers Z and the levers 12 on the protector mod;whereby the shuttle is errested by the increasing pressure on the swelland increasing resistance on the picker-stick, as described.

In witness whereof I have hereunto set my I 5 hand.

RICHARD THAOKERAY. Witnesses:

JOSEPH A. MILLER, J12, M. F. BLIGH.

